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THREE PHASE THREE LEVEL VOLTAGE FED INVERTER FOR A DOUBLY FED INDUCTION MOTOR

Walid Emar, Omar A. Saraereh, Karim Aljebory

Abstract


BACKGROUND: The essay evaluates the modeling, control and analysis of a doubly-fed induction machine (DFIM) using a three level three stage voltage source inverter known as voltage source converter (VSC).

AIM: Both cases mentioned above are exhibited and analyzed. Distinctive torque and rate control strategies could be examined with the goal of wiping out the back electromotive power (EMF), which adversely affects the rotor current often considered as a load disturbance. 

MATERIALS AND METHODS: VSC is utilized to control the extent and period of the rotor voltage in a proficient way and can consequently be used to control the dynamic and receptive force of the doubly fed induction machine. The stator circuit of the DFIM may either be supplied by a variable recurrence VSC or straightforwardly from the ac system.

RESULTS: The reproduction results demonstrate the proposed three level three stage inverter which offers great reactions as far as optimizing, little overshoot, and little enduring lapses by a significant element execution. Another point of reference performance is its simple modern application with an intelligent controller and field situated control technique.

CONCLUSION: Consequently, the dynamic behavior of the motor and the energy efficiency of the overall system are progressively improved and a complete suppress of the influence of the variation in the motor load on the speed of the motor is achieved. Furthermore, a new topology of the voltage source Converter (VSC) known as a multilevel VSC is introduced. The result of using such converter is the increase in the output power, the reduction in the harmonic content at the system output. The findings were analyzed in Simplorer 7 to demonstrate the adequacy of the proposed strategies for velocity and voltage control of doubly fed induction machine utilizing VSC.


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